Combine all ingredients in a blender; puree until smooth. Strain mixture through a fine-mesh sieve into a large measuring cup, pressing on and then discarding solids. Skim off any foam; pour mixture evenly into molds. Freeze 1 hour. Insert sticks and freeze until firm, about 24 hours.
To make non-alcoholic: Replace 2 Tbsp. orange liqueur with orange juice and 1/4 cup tequila with water.